Question

Which of the following graphs cannot possibly represent one dimensional motion of a particle?

• A. I and II
• B. II and III
• C. II and IV
• D. All four

Answer 1

Answer: (D)

$I$ does not represent the one dimensional motion because total distance covered by a particle increases and decreases with time. $II$ and $III$ do not represent the one dimensional motion because of a particular time position cannot have two values. $IV$ is not possible because speed can never be negative.